Push-button switch

Abstract

A thin type push-button switch of momentary operation, comprising a movable contact piece which includes an inversion portion and arms formed in a manner to hold the inversion portion therebetween. The inversion portion is formed with a movable contact portion having tongues, and is integrally formed of a resilient metal sheet. A case includes a groove held in engagement with one of the arms and stationary contacts are fixed within the case. A slider includes a push-button portion and a groove held in engagement with the other arm and is slidable with respect to the case. When the push-button portion is depressed, the inversion portion of the movable contact piece is inverted to electrically connect the movable contact portion and the stationary contacts. When the depressing force is released, the inversion portion is restored by the resiliency of the movable contact piece, to disconnect the movable contact portion and the stationary contacts.

What is claimed is: 
     
       1. A push-button switch comprising an inversive spring movable contact piece including an inversive portion and arms formed in a manner to hold said inversive portion therebetween, said inversive portion and said arms being integrally formed of a highly-resilient electrically-conductive metal sheet, said inversive portion being substantially centrally formed with a movable contact portion having tongues; a case including an engaging portion held in engagement with one of said arms; stationary contacts fixed within said case; and a slider including a push-button portion and an engaging portion held in engagement with the other arm and installed in a manner to be movable with respect to said case; said movable contact portion being held across from said stationary contacts, said inversive portion of said inversive spring movable contact piece being inverted by depressing said push-button portion, thereby to establish electrical contact between said movable contact portion and said stationary contacts. 
     
     
       2. A push-button switch according to claim 1, wherein said tongues are formed on respective sides of said movable contact portion. 
     
     
       3. A push-button switch according to claim 2, wherein said each tongue is formed of a plurality of metal strips. 
     
     
       4. A push-button switch according to claim 1, wherein said engaging portion of said case and said engaging portion of said slider are V-shaped grooves. 
     
     
       5. A push-button switch including a case having a wall portion containing a plurality of fixed contacts; a slider adapted to be moved inwardly of said casing; a movable contact having a central contact portion extending away from said fixed contacts, a first arm portion adapted to be held by said case, a second arm portion located oppositely from said first arm portion and adapted to be held by said slider, and means including connecting portions extending between said arm portions and said central portion for holding said central portion in position while permitting it to rapidly invert during inward movement of said slider to bring said central portion into engagement with said fixed contacts. 
     
     
       6. A push-button switch according to claim 5, said central portion including a plurality of tongues extending towards said fixed contacts.